The logs look a bit weird und truncated, like the
sogod log message. I don’t know how the logs somehow reflect the unclear issue you’re having. The logs show the IPs where connections are coming from, like email clients. Of course the client IPs won’t change when you change your server IP.
And mailcow isn’t aware about the public IP you’re using, as that’s “abstracted” by using Docker in between.
Beside that, the IPs you’re referencing aren’t starting like